Loom 0.11.0

Loom 0.11.0

Vigil-style diagnostics release.

• Added read-only diagnostics commands: status, verify, checks:command-catalog, guards:summary, and self-heal:plan.
• Added text and JSON output for diagnostics commands.
• Added command-catalog validation for duplicate commands, alias collisions, incomplete metadata, synopsis drift, and read/write access flag drift.
• Added tests for diagnostics readiness, guard summaries, self-healing plan visibility, and JSON report encoding.

Verification:

• swift test passed: 30 tests.
• swift build -c release passed.
• .build/release/loom version reports loom 0.11.0.
• Smoke checks passed for status --json, verify --json, checks:command-catalog --json, guards:summary, and self-heal:plan.